/// <summary>
/// Creates a <see cref="GdiFontMetrics"/> object from <b>baseFontName</b>
/// </summary>
private void ObtainFontMetrics() {
dc = new GdiDeviceContent();
GdiFont font = GdiFont.CreateDesignFont(
properties.FaceName, properties.IsBold, properties.IsItalic, dc);
unicodeRanges = new GdiUnicodeRanges(dc);
metrics = font.GetMetrics(dc);
}
public GdiFontCreator(GdiDeviceContent dc)
{
this.dc = dc;
this.header = new TrueTypeHeader();
this.ms = new MemoryStream();
this.fs = new FontFileStream(ms);
}
internal GdiFontMetrics(GdiDeviceContent dc, GdiFont currentFont)
{
if (dc.Handle == IntPtr.Zero)
{
throw new ArgumentNullException("dc", "Handle to device context cannot be null");
}
if (dc.GetCurrentObject(GdiDcObject.Font) == IntPtr.Zero)
{
throw new ArgumentException("dc", "No font selected into supplied device context");
}
this.dc = dc;
this.currentFont = currentFont;
// FontFileReader requires the font facename because the font may exist in
// a TrueType collection.
StringBuilder builder = new StringBuilder(255);
LibWrapper.GetTextFace(dc.Handle, builder.Capacity, builder);
faceName = builder.ToString();
ranges = new GdiUnicodeRanges(dc);
reader = new FontFileReader(new MemoryStream(GetFontData()), faceName);
converter = new PdfUnitConverter(EmSquare);
// After we have cached the font data, we can safely delete the resource
currentFont.Dispose();
}
/// <summary>
/// Class constructor.
/// </summary>
/// <param name="start">Value representing start of unicode range.</param>
/// <param name="end">Value representing end of unicode range.</param>
public UnicodeRange(GdiDeviceContent dc, ushort start, ushort end) {
if (start > end) {
throw new ArgumentException("start cannot be greater than end");
}
this.dc = dc;
this.start = start;
this.end = end;
}
/// <summary>
/// Creates a font whose height is equal to the negative value
/// of the EM Square
/// </summary>
/// <param name="faceName">The typeface name of a font.</param>
/// <returns></returns>
public static GdiFont CreateDesignFont(string faceName, bool bold, bool italic, GdiDeviceContent dc) {
// TODO: Is there a simpler method of obtaining the em-sqaure?
GdiFont tempFont = GdiFont.CreateFont(faceName, 2048, bold, italic);
dc.SelectFont(tempFont);
GdiFontMetrics metrics = tempFont.GetMetrics(dc);
tempFont.Dispose();
return CreateFont(faceName, -Math.Abs(metrics.EmSquare), bold, italic);
}
/// <summary>
/// Class constructor.
/// </summary>
/// <param name="start">Value representing start of unicode range.</param>
/// <param name="end">Value representing end of unicode range.</param>
public UnicodeRange(GdiDeviceContent dc, ushort start, ushort end)
{
if (start > end)
{
throw new ArgumentException("start cannot be greater than end");
}
this.dc = dc;
this.start = start;
this.end = end;
}
/// <summary>
/// Loads all the unicode ranges.
/// </summary>
private void LoadRanges(GdiDeviceContent dc) {
GlyphSet glyphSet = new GlyphSet();
uint size = LibWrapper.GetFontUnicodeRanges(dc.Handle, glyphSet);
if (size == 0) {
throw new Exception("Unable to retrieve unicode ranges.");
}
unicodeRanges = new UnicodeRange[glyphSet.cRanges];
for (int i = 0, offset = 0; i < glyphSet.cRanges; i++) {
ushort wcLow = (ushort) (glyphSet.ranges[offset++] + (glyphSet.ranges[offset++] << 8));
ushort cGlyphs = (ushort) (glyphSet.ranges[offset++] + (glyphSet.ranges[offset++] << 8));
unicodeRanges[i] = new UnicodeRange(dc, wcLow, (ushort) (wcLow + cGlyphs - 1));
}
}
/// <summary>
/// Loads all the unicode ranges.
/// </summary>
private void LoadRanges(GdiDeviceContent dc)
{
GlyphSet glyphSet = new GlyphSet();
uint size = LibWrapper.GetFontUnicodeRanges(dc.Handle, glyphSet);
if (size == 0)
{
throw new Exception("Unable to retrieve unicode ranges.");
}
unicodeRanges = new UnicodeRange[glyphSet.cRanges];
for (int i = 0, offset = 0; i < glyphSet.cRanges; i++)
{
ushort wcLow = (ushort)(glyphSet.ranges[offset++] + (glyphSet.ranges[offset++] << 8));
ushort cGlyphs = (ushort)(glyphSet.ranges[offset++] + (glyphSet.ranges[offset++] << 8));
unicodeRanges[i] = new UnicodeRange(dc, wcLow, (ushort)(wcLow + cGlyphs - 1));
}
}
internal GdiFontMetrics(GdiDeviceContent dc, GdiFont currentFont) {
if (dc.Handle == IntPtr.Zero) {
throw new ArgumentNullException("dc", "Handle to device context cannot be null");
}
if (dc.GetCurrentObject(GdiDcObject.Font) == IntPtr.Zero) {
throw new ArgumentException("dc", "No font selected into supplied device context");
}
this.dc = dc;
this.currentFont = currentFont;
// FontFileReader requires the font facename because the font may exist in
// a TrueType collection.
StringBuilder builder = new StringBuilder(255);
LibWrapper.GetTextFace(dc.Handle, builder.Capacity, builder);
faceName = builder.ToString();
ranges = new GdiUnicodeRanges(dc);
reader = new FontFileReader(new MemoryStream(GetFontData()), faceName);
converter = new PdfUnitConverter(EmSquare);
// After we have cached the font data, we can safely delete the resource
currentFont.Dispose();
}
/// <summary>
/// Class constructor.
/// </summary>
/// <param name="dc">A non-null reference to a wrapper around a GDI device context.</param>
public GdiFontEnumerator(GdiDeviceContent dc)
{
this.dc = dc;
}
public GdiFontCreator(GdiDeviceContent dc) {
this.dc = dc;
this.header = new TrueTypeHeader();
this.ms = new MemoryStream();
this.fs = new FontFileStream(ms);
}
/// <summary>
/// Class constuctor.
/// </summary>
/// <param name="dc"></param>
public GdiUnicodeRanges(GdiDeviceContent dc)
{
LoadRanges(dc);
}
public GdiFontMetrics GetMetrics(GdiDeviceContent dc) {
return new GdiFontMetrics(dc, this);
}
/// <summary>
/// Class constructor.
/// </summary>
/// <param name="dc">A non-null reference to a wrapper around a GDI device context.</param>
public GdiFontEnumerator(GdiDeviceContent dc) {
this.dc = dc;
}
/// <summary>
/// Creates a font whose height is equal to the negative value
/// of the EM Square
/// </summary>
/// <param name="faceName">The typeface name of a font.</param>
/// <returns></returns>
public static GdiFont CreateDesignFont(string faceName, bool bold, bool italic, GdiDeviceContent dc)
{
// TODO: Is there a simpler method of obtaining the em-sqaure?
GdiFont tempFont = GdiFont.CreateFont(faceName, 2048, bold, italic);
dc.SelectFont(tempFont);
GdiFontMetrics metrics = tempFont.GetMetrics(dc);
tempFont.Dispose();
return(CreateFont(faceName, -Math.Abs(metrics.EmSquare), bold, italic));
}
/// <summary>
/// Class constuctor.
/// </summary>
/// <param name="dc"></param>
public GdiUnicodeRanges(GdiDeviceContent dc) {
LoadRanges(dc);
}
public GdiFontMetrics GetMetrics(GdiDeviceContent dc)
{
return(new GdiFontMetrics(dc, this));
}
/// <summary>
/// Creates a font whose height is equal to the negative value
/// of the EM Square
/// </summary>
/// <param name="faceName">The typeface name of a font.</param>
/// <returns></returns>
public static GdiFont CreateDesignFont(string faceName, bool bold, bool italic, GdiDeviceContent dc)
{
GdiFont tempFont = GdiFont.CreateFont(faceName, 2048, bold, italic);
dc.SelectFont(tempFont);
GdiFontMetrics metrics = tempFont.GetMetrics(dc);
tempFont.Dispose();
return(CreateFont(faceName, -Math.Abs(metrics.EmSquare), bold, italic));
}
